Dai Yamazaki from the University of Tokyo and colleagues have released in 2017 a new global 90 m resolution DEM based on the two existing global DEMs: SRTM3 and AW3D. The data can be downloaded (for research and education purposes) from the iis.u-tokyo.ac.jp institute page.

The data distributed here are in EHdr format, unprojected and referenced to the WGS84 geodetic datum. They are derived from CGIAR-CSI SRTM v4.1 and ASTER GDEM v2 data products. These data have been processed and merged to provide continuous coverage of ~91% of the globe. Processing and merging methodology are available in Robinson et al. (2014).

International Society for Geomorphometry (ISG) is an international association of researchers and experts open for free exchange of knowledge and opinions about various aspects of DEM processing and digital relief analysis.